/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.dxf2.metadata.objectbundle.validation;

import static java.util.Collections.emptyList;
import static org.hisp.dhis.dxf2.metadata.objectbundle.validation.ValidationUtils.createObjectReport;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Consumer;
import java.util.stream.Collectors;
import org.hisp.dhis.attribute.Attribute;
import org.hisp.dhis.common.IdentifiableObject;
import org.hisp.dhis.dxf2.metadata.objectbundle.ObjectBundle;
import org.hisp.dhis.feedback.ErrorCode;
import org.hisp.dhis.feedback.ErrorReport;
import org.hisp.dhis.feedback.ObjectReport;
import org.hisp.dhis.importexport.ImportStrategy;
import org.hisp.dhis.preheat.Preheat;
import org.hisp.dhis.schema.Schema;
import org.springframework.stereotype.Component;

/**
 * @author Luciano Fiandesio
 */
@Component
public class MandatoryAttributesCheck implements ObjectValidationCheck {
  @Override
  public <T extends IdentifiableObject> void check(
      ObjectBundle bundle,
      Class<T> klass,
      List<T> persistedObjects,
      List<T> nonPersistedObjects,
      ImportStrategy importStrategy,
      ValidationContext ctx,
      Consumer<ObjectReport> addReports) {
    Schema schema = ctx.getSchemaService().getDynamicSchema(klass);
    List<T> objects =
        selectObjectsBasedOnImportStrategy(persistedObjects, nonPersistedObjects, importStrategy);

    if (objects.isEmpty() || !schema.hasPersistedProperty("attributeValues")) {
      return;
    }

    for (T object : objects) {
      List<ErrorReport> errorReports = checkMandatoryAttributes(klass, object, bundle.getPreheat());

      if (!errorReports.isEmpty()) {
        addReports.accept(createObjectReport(errorReports, object, bundle));
        ctx.markForRemoval(object);
      }
    }
  }

  private List<ErrorReport> checkMandatoryAttributes(
      Class<? extends IdentifiableObject> klass, IdentifiableObject object, Preheat preheat) {
    if (object == null
        || preheat.isDefault(object)
        || !preheat.getMandatoryAttributes().containsKey(klass)) {
      return emptyList();
    }

    Set<String> mandatoryAttributes = preheat.getMandatoryAttributes().get(klass);
    if (mandatoryAttributes.isEmpty()) {
      return emptyList();
    }
    Set<String> missingMandatoryAttributes = new HashSet<>(mandatoryAttributes);
    object
        .getAttributeValues()
        .forEach(
            attributeValue ->
                missingMandatoryAttributes.remove(attributeValue.getAttribute().getUid()));

    return missingMandatoryAttributes.stream()
        .map(
            att ->
                new ErrorReport(Attribute.class, ErrorCode.E4011, att)
                    .setMainId(att)
                    .setErrorProperty("value"))
        .collect(Collectors.toList());
  }
}
